Synthesis of Diatom-based Cr(VI) Surface Ion-Imprinted Adsorption Material and Its Adsorption Properties to Cr(VI)
ZHANG Hang1, MA Rong1, GONG Liang2, HUANG Lili2, CHEN Nanchun1, XIE Qinglin2,3, MA Lili2
1 School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China 2 School of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, Guangxi, China 3 Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, Guangxi, China
Abstract: In this work, an environmentally friendly chromium ion-imprinted adsorption material was synthesized via surface ion-imprinted technique. The diatom chromium ion-imprinted polymer (DE/Cr(VI)-IIP) was formed by grafting the complex of diatom as matrix material, Cr(VI) ion as template, 3-aminopropyltriethoxysilane (APTES) as functional monomer, and epichlorohydrin (ECH) as crosslinker. The material was characterized by using Fourier transform infrared (FTIR), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray photoelectron spectroscopy (XPS) and Zeta potential. The formation process of the material was explored. The adsorption of the material to Cr(VI) ions conforms to Langmuir isotherm model and pseudo-second-order kinetic model. The material showed high adsorption rate, high selectivity and good regeneration.
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2022, Vol. 36 
